| APA | UNDU. (2012, February 15). In Acronym Geek. Retrieved 07:10, February 15, 2012, from http://www.acronymgeek.com/UNDU |
| MLA | "UNDU." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/UNDU>. |
| MHRA | 'UNDU', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/UNDU> [accessed 15 February 2012] |
| Chicago | "UNDU", http://www.acronymgeek.com/UNDU (accessed February 15, 2012). |
| CBE/CSE | UNDU [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/UNDU. |
| Bluebook | UNDU, http://www.acronymgeek.com/UNDU (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UNDU, http://www.acronymgeek.com/UNDU (optional description here) (as of Feb. 15, 2012, 07:10). |
| AMA | UNDU. Acronym Geek. February 15, 2012, 07:10. Available at: http://www.acronymgeek.com/UNDU. Accessed February 15, 2012, 07:10. |